Legitimate fan-translated "zips" are common in the community, but they are often hosted on sites filled with aggressive ads.
Be cautious of files that require an "installer" or are suspiciously small (under 10MB) or large (over 500MB) for a single guidebook. Real scanlation zips should contain image files (JPG/PNG). Download Fairy Tail Inside zip
The physical book is a "plus-sized" databook covering the series' early-to-mid arcs. If you are looking into a "zip" download of this title, it usually contains: it usually contains: